Packing retainer for dough-mixing machines and the like



July 24, 1928. 1,678,194 F. NoTz ET AL y PCKING RETAINER FOR DOUGH HIKING MACHINES AND THE LIKE hud July 2s. 41925 v A more fully described,

aen'ted `lillyr 24, 1928.

UNITED STATES PATENT OFFICE.

FELIX No'rz AND'GEORCE ROYAN, OF CHICAGo,A ILLINOIS, AssIGNORs ro AMERICAN OVEN a MACIIIN COMPANY, or CHICAGO, ILLINOIS. A CORPORATION OF ILLINOIS.

IACKING RETAINER vFor. Dorien-MIXING MACHINES AND man LIKE.

A'pplcationled July 23, 1925. Serial No. 45,492.

Thisy invention relates to dough mixing machines and the like and more particularly to a novel bearing construction andimixing receptacle or drum end packing retainer for such machines as are employed for mixing dough and like plastic material.

-The type of machine to which the-invention relates and for whichthe-novel bear-- ing construction and packing retainer 1sespecially adapted to be employed is shown and described in our co-pendingapplication,

filed'` July 23rd, 1925, under ,Serial No.V

45,491, although not limited to such application.

Among the objects of the invention are to positively prevent the dough from passing into the bearings or working parts from within the mixing `chamber or drum, and the lubricant from leaking. or escaping into the dough and mixingframe and beater and spoiling the batch of dough; to provide a novel shaft and mixingreceptaole or drum end packing and packing retainer for accomplishing the foregoing objects; to rovide novel 'means for tightening the packing and adjustingrthe same with respect to the mixing receptacle or drum, and for wfacilitating repairing and replacement of the packing, and generally to improve suoli structures and simplify and facilitate the manufacture and assemblage thereof.

The invention kalso consists in certain other features of novelty to be 'hereinafter illustrated in the accompanying dra-Wings and particularly pointed out in the claims at the end of the specification.

In the drawings Fig. 1 is a sectional elevation ofa dough Referring to thedrawings in detail, 3 des-v ignates theinner Iwall of one of the housings of the frame of the machine having bearing sleeves 4, of which `only oneis shown for illustrating the construction and application of the invention at one side of themachine.

The mixing receptacle or drum is designated at' and has one ofits side walls 6 equipped with the novel bearing and packing retainer, the-receptacle or drum being pivotally mounted to be ytilted inthe housing in; anypreferred way such as described in our 'co-pending application above referred to. Inv the construction shown, the side Wall or drum end 6 is provided with a hub extension 7 which has pivotal bearngwin the sleeve 4 and is provided with a shoulder 8 engaging the inner end of the sleeve to take up end thrust. Thehub is further provided With a diametrical slot 9, forming diametrically opposed spaced Webs 10, for the purpose of accommodating the adjustable packing retainer to be hereinafter `more fully described.- The mixing frame or beater of the machine is designated at 11 and is illustrated as being of that form employing afpair of short shafts, although it is to be understood that the 1 employmentk of'one or two shafts for revolubly mounting the mixing frame is optional. Inv the form shown, the mixing frame has a sleeve portion 12 which is keyed to the shortsliaft 13 as indicated at 14.

kThe shaft 18 extends across the slot 9 and isjoui'naled in the hub 7 for freerotation. In order` that the shaft may turn without undue friction, the hub `7 is rovided with anti-friction bearings 15 pre erablyv of the roller bearing type'and the shaft 13 has a reduced `portion 16 providing a shoulder 17 engaging the bearings to take up end thrust and resist axial displacement of themixing frame and shafts within the mixing receptacle or drum.

An annular bearing member or plate 18 is mounted in a recess in the outer face of the mixing frame 11 at the hub thereof around vthe shaft 13 and al yflanged packing gland andfdrum end bushing 19 are mounted on the shaft'lwith the flangefthereof seated in a corresponding annular recess or depression in the Opposed inner face of the side wall 6 of the mixing kreceptacle or drum so that when these parts are brought into bearing contact, a tight and effective seal against the escape of lubricant into the mixing receptacle or against the passage of the dough into the bearings of the machine is provided. The side wall or drum end 6 is provided at diametrically Opposite points in line with the slot 9 withv bosses 20 to the outer portions of which'angular lugs 21 are secured as by means of screws 22. The outstanding portions of these lugs extend at right anglesk to theplaneof the wall Gand each is provided lwith a machined guide slot or ygroove 23. Retainers 24 have reduced heads 25 at their outer ends slidable in 'the grooves 23 parallel to the aXis of theshaft 13 and the inner ends of the retainers are enlarged and prolonged' longitudinally of the shaft as well as recessed to conform to the curvature thereof as indicated at 2G.

`A packing 27 is interposed betweeii'mthe semi-circular portions of the retainers and the shaft and is mounted on the shaft between the undercut outer end of the sleeve portion 28 of the gland 19 andiianges 29 at the outer ends of the retainers. The two retainers extend into the slot 9 at diametrically opposite sides of the shaft 13and are disposed in alignment so-as to encircle the` shaft and packingto permit application, adjustment, or removal of the retainers with convenience. l L

Adjusting screws 30 are engaged in threaded openings in the retainers and contactwith the outer surface of the wall 6 to. permit adjustment of the retainers with respect to the packing.y These screws coact withretainingscrews 31l which are rotatably mountedA in the retainers insteadof having threaded engagement therewith and are threaded in sockets 32 in the wall 6. A Thus, the screws 31 serve to draw the retainers toward the wall@ and permit the packing 2,7 and the .retainersin adjusted position so ythat the likelihood of the parts becoming loose during the operation of the machine is avoided.V

While 'wedo not desire to be limited toL the exactfarrangement shown, it is,iirefer- Y able to employ one adjusting screw inl con-` nection ywith each retainer, each of' the retainers having` a central loiigitudinalrweb or rib 33 toreinforce or stiiien the same at the. inside and outside, whereby the parts may withstand the pressure applied thereto and maintain their adjustment. l

It is also preferable to employ two tightening screws 31 on each retainer and as shown, the tightening screws are located inwardlyof the adjusting screws and equidistantly spaced lat either side o-f the adjusting screws and the reinforcing webs-33. The extended end 16 of the shaft 13 is adapted for connection with suitable driving means as shown by co-pending application above referred to, thus mounting the packing retainer on the driving end of the mixing frame or beater in such a manner as rto facilivtate assemblage and lmounting of the'parts as well as'having access lto the bearings for the purpose of repairing or renewal, as well las disassemblage of the machine. 'But it is /Vhile we have shownand described our f invention in a preferred form, weare aware that various cli-anges and modifications may be made without departing from the prin-y ciples of our invention, the scope ofl which is tobe deterniiiiedby the appended claims.

vWe claim as our invention: i

1. A packing device of the type described comprisingA ar pair of members adapted for rotational' movement` with respect to` eachr other, a packinguretainer, means carried by onemember tofpositively support the packing retainerand,said means and said packing retainer being formed with relatively sliding vand interengaging elements having smooth contacting surfaces thereby to permit primary adjustment of said packing retainer with respect to said members,y other means lindependent of said l interengaging means for` adjusting said retainer, and means for locking y said retainer fin `adj usted position-` 2.v A packing deviceof theL type described comprising a paircf members adapted for rotational movement with respectto each other, a bearing member carried by one of said members, apacking gland onthe kother member adjacent said bearingfm'ember, a packing retainer carried by said othermemer,kpackiiig in said retainer, said ypacking gland having l'a with said bearing member, means carriedby said other memberto positively support the packing retainer, and saidmeans and said packing retainer being formed, with relatively `Sliding and interengaging elements having smooth contacting surfaces therebyv to permit primary adjustment of said packingv retainer with respect to` said members, other means independent of said interengaging meansjfor adjusting the retainer and drawing the same'against the packing, thereby. to force the bearing face of the gland kagainst the bearing member, andlineans for locking the retainer in adjusted position.

3. A packing deviceof the type described comprising a pairy of members adapted for iio `bearing lface cooperating rotational movement with respect to eachl other, a bearing member carried by one of said members, a packing gland on the other member adjacent said bearing member and having a bearing face cooperating With said bearing member, a acking retainer carried by said other mem er, packing in said retainer, outstanding guide lugs carried by said latter member and having guidevvays slidably receiving the outer ends of said retainer for movement parallel to the axis of the irst named member, tightening screws carried by the retainer and having threaded engageL` ment with said member for drawing the retainer against the packing and forcing the bearing face of the gland against the bearing member, and adjusting screws threaded through the retainer and coacting with said other member to lock the retainer in adjusted position. y

4. A packing device of the class described, comprising a pair of members adapted for rotationwith respect to each other, one of said members. having a bearing portion, a packing gland on the other member adapted to engage the bearing portion, a packing retainer on the latter member, guideways on the latter member receiving theretainer for sliding movement axially, means for drawing. the retainer against the packing and forcing the packing gland against the bearing portion, and means carried by the retainer and engaging the latter member to hold the retainer in adjusted position.

FELIX NOTZ. GEORGE ROYAN. 

